Depends on what rear axle you have and how wide you want to go.
You could put 255/60/15’s on the back with a 15x7 and a 4.25” backspace most likely.
On a demon though you can fit up to a 275/60/15 on a 15x8, backspace has to be just about perfect though so I’d need to know your bolt pattern and which rear axle you’re running for the backspace on that.
